Unable to use MFA with FortiGate SSLVPN

I am trying to set up a FortiGate SSL VPN application and was able to sync my Azure directory including the User Group needed to access Duo.

After configuring the proxy on the RADIUS Server, and on the FortiGate itself using RADIUS server, I attempted to connect but the message I get through FortiClient is VPN Unreachable.

I checked the Duo Global policy and as a test, under Authentication Policy. I selected bypass 2FA. After doing so, I tested the FortiClient connection and it went through no problem.

Was wondering if anyone else had a similar issue?

Resolved. had to create a username alias in order to authenticate.

Glad you figured it out, @eber1233 .